CN105930005B - Touch device - Google Patents

Abstract

The invention provides a touch device, comprising: a substrate; the detection electrodes are arranged in an m-row n-column array mode, m and n are integers, m is more than or equal to 1, and n is more than or equal to 1; the detection lead extends along the column direction, one detection electrode is electrically connected with at least one detection lead, and the detection lead and the detection electrode are arranged in the same layer by using the same material; at least two reference electrodes extending in a row direction and arranged in a column direction, one reference electrode overlapping one detection electrode in a direction perpendicular to the substrate, the reference electrodes and the detection electrodes forming a coupling capacitance for detecting a pressure in the direction perpendicular to the substrate; the touch device inputs a detection signal to the detection electrodes in a pressure detection stage, and sequentially inputs a reference voltage to one of the reference electrodes and inputs the detection signal to the other reference electrodes. The touch device provided by the invention eliminates partial lead capacitance between the detection lead and the reference electrode, thereby improving the working performance of the touch panel.

Description

A kind of touch device

Technical field

The present invention relates to technical field of touch control, more particularly to a kind of touch device.

Background technology

Fig. 1 is a kind of touch panel schematic diagram with pressure detecting function that the prior art provides, including is arranged in baseReference electrode 2 on plate 1, the detecting electrode 3 with pressure detecting function and with detecting electrode 3 use same material same layerThe detection lead 5 of setting, detecting electrode 3 are connected to form one structure with detection lead 5.Between reference electrode 2 and detecting electrode 3The basic capacitance for detection pressure variable quantity is formed, when pressure touch behavior occurs for touch object, reference electrode 2 and detectionThe distance between electrode 3 changes, and basic capacitance is caused to change, and the electric signal that corresponding detecting electrode 3 exports occursVariation, detecting electrode 3 are exported changed electric signal as pressure detecting signal, and data processing unit 4 is examined according to pressureSurvey the size that pressure is calculated in signal.

Since pressure detecting is not high for the resolution requirement of electrode, so the area of detecting electrode 3 is bigger, detection electricityThe material of pole 3 is generally tin indium oxide (Indium Tin Oxides, ITO), and resistance value is also larger, and pressure-sensing signal passesIt is distorted during defeated serious.

Detection lead 5 and detecting electrode 3 are integral structures, and the prior art increases the width of detection lead 5, to reduce inspectionIt surveys electrode 3 and detects the whole resistance of lead 5；But trace width increase can cause between detection lead 5 and reference electrode 2Lead capacitance increase because detection lead 5 be structure as a whole with detecting electrode 3, the increase of lead capacitance can cause for visitingThe basic capacitance of measuring pressure variable quantity increases, and the size in pressure is identical, and basic capacitance increase is unfavorable for detection pressurePower detects signal, still can not improve the working performance of touch panel.

Invention content

In view of this, the present invention provides a kind of touch device, including：

Substrate；Detecting electrode is arranged in m row n array column, and m, n are integer and m >=1, n >=1；Lead is detected, along rowDirection extends, and one piece of detecting electrode is electrically connected at least one detection lead, and detection lead uses same material with detecting electrodeSame layer is arranged；At least two reference electrodes extend and are arranged along column direction, a reference electrode and a line along line directionDetecting electrode overlaps in a direction perpendicular to a substrate, reference electrode and detecting electrode formed coupled capacitor for detect perpendicular toPressure on orientation substrate；

Touch device includes the pressure detecting stage；In the pressure detecting stage, is inputted to detecting electrode and detect signal, and according toA secondary reference electrode input reference voltage thereto, while inputting detection signal to remaining reference electrode.

Compared with prior art, the present invention at least has the advantages that one of prominent as follows：

In a kind of touch device provided by the invention, the part lead capacitance between detection lead and reference electrode is eliminatedInfluence for the basic capacitance for detection pressure variable quantity, to improve the working performance of touch panel；Further, existThe width for increasing detection lead in the embodiment to reduce the resistance of detecting electrode, still can not additionally increase and be used forThe basic capacitance of detection pressure variable quantity, further increases the working performance of touch panel.

Description of the drawings

Fig. 1 is a kind of touch panel schematic diagram with pressure detecting function that the prior art provides；

Fig. 2 is a kind of touch control device structure schematic diagram provided by one embodiment of the present invention；

Fig. 3 is a kind of touch control device structure schematic diagram that further embodiment of the present invention provides；

Fig. 4 is a kind of a kind of signal waveform schematic diagram in the pressure detecting stage for touch device that Fig. 3 embodiments provide；

Fig. 5 is a kind of another signal waveform schematic diagram in the pressure detecting stage for touch device that Fig. 3 embodiments provide；

Fig. 6 is a kind of signal wave in the pressure detecting stage and display stage for a kind of touch device that Fig. 3 embodiments provideShape schematic diagram；

Fig. 7 is the sectional view along AA ' in Fig. 2；

Fig. 8 is a kind of touch control device structure schematic diagram that another embodiment of the invention provides.

Specific implementation mode

To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with attached drawing and implementationThe present invention will be further described for example.

It should be noted that elaborating detail in the following description in order to fully understand the present invention.But this hairBright to be implemented different from other manner described here with a variety of, those skilled in the art can be without prejudice in the present inventionSimilar popularization is done in the case of culvert.Therefore the present invention is not limited by following public specific implementation mode.

Fig. 2 is a kind of touch control device structure schematic diagram provided by one embodiment of the present invention.Referring to FIG. 2, the present embodimentThe touch device of offer includes substrate 10；Detecting electrode 20 is arranged in m row n array column, and m, n are integer and m >=1, n >=1；Lead 40 is detected, is extended along column direction x, one piece of detecting electrode 20 is electrically connected at least one detection lead 40, detects lead40 are arranged with detecting electrode 20 using same material same layer.At least two reference electrodes 30, it is in a strip shape, extend along line direction yAnd it being arranged along column direction x, a reference electrode 30 is being overlapped with a line detecting electrode 20 on the direction of substrate 10,Reference electrode 30 forms coupled capacitor with detecting electrode 20 and upwards pressure perpendicular to 10 side of substrate for detecting.The present invention is implementedA kind of touch device that example provides includes the pressure detecting stage, and in the pressure detecting stage, detection signal is inputted to detecting electrode 20,And a 30 input reference voltage of reference electrode thereto successively, while inputting detection signal to remaining reference electrode 30.

In order to clearly illustrate a kind of touch device provided in an embodiment of the present invention, with m=5, illustrated for n=4.Referring to FIG. 3, touch device includes substrate 10, detecting electrode 20 is arranged in 5 row, 4 array column, including the first row detecting electrode21, the second row detecting electrode 22, the third line detecting electrode 23, fourth line detecting electrode 24 and fifth line detecting electrode 25；BenchmarkElectrode is in a strip shape, extends along line direction y and is arranged along column direction x, reference electrode includes 5, respectively along row sideTo tactic first reference electrode 31 of x, Article 2 reference electrode 32, Article 3 reference electrode 33, Article 4 benchmark electricityPole 34 and Article 5 reference electrode 35；Wherein, first reference electrode 31 and the first row detecting electrode 21 are perpendicular to substrate 10Direction on overlap, Article 2 reference electrode 32 and the second row detecting electrode 22 are overlapping on the direction of substrate 10, theThree reference electrodes 33 are being overlapped with the third line detecting electrode 23 on the direction of substrate 10, Article 4 reference electrode 34 withFourth line detecting electrode 24 is overlapping on the direction of substrate 10, Article 5 reference electrode 35 and fifth line detecting electrode 25It is being overlapped on the direction of substrate 10.

Touch device includes the pressure detecting stage, in the pressure detecting stage, is detected to the first row detecting electrode 21, the second rowElectrode 22, the third line detecting electrode 23, fourth line detecting electrode 24 and the input detection signal of fifth line detecting electrode 25, and according toIt is secondary to first article of reference electrode 31, Article 2 reference electrode 32, Article 3 reference electrode 33, Article 4 reference electrode 34 and the 5th35 therein input reference voltages of reference electrode, while inputting detection signal to remaining reference electrode 30.It please refers to Fig.3And Fig. 4, Fig. 4 are a kind of a kind of signal waveform schematic diagram in touch device pressure detecting stage that Fig. 3 embodiments provide, pressure inspectionThe survey stage includes T1 moment, T2 moment, T3 moment, T4 moment and T5 moment.The T1 moment, the T2 moment, the T3 moment, the T4 moment andT5 moment, detecting electrode 20 input detection signal AC；At the T1 moment, first 31 input reference voltage DC of reference electrode, theTwo reference electrodes 32, Article 3 reference electrode 33, Article 4 reference electrode 34 and Article 5 reference electrode 35 input detectionSignal AC, this moment, the first row detecting electrode 21 detect whether its region occurs pressure touch behavior.When the first row detectsWhen electrode 21 carries out pressure touch detection, the input of the first row detecting electrode 21 detects signal AC and first reference electrode 31 is defeatedEnter reference voltage DC, therefore with first reference electrode 31 to form coupled capacitor vertical for detecting for the first row detecting electrode 21Directly upward pressure in 10 side of substrate, the same input detection signal for the detection lead 40 being connect with the first row detecting electrode 21AC, therefore in Article 2 reference electrode 32, Article 3 reference electrode 33, Article 4 reference electrode 34 and Article 5 reference electrode 35In the region at place, detection lead 40 and Article 2 reference electrode 32, Article 3 reference electrode 33, Article 4 reference electrode 34 andThe lead capacitance that Article 5 reference electrode 35 is formed is eliminated.As it can be seen that a kind of touch device of offer of the present invention disappears at the T1 momentIn addition to the part lead capacitance between detection lead and reference electrode is for the shadow of the basic capacitance for detection pressure variable quantityIt rings, to improve the working performance of touch panel.

At the T2 moment, 32 input reference voltage DC of Article 2 reference electrode, first reference electrode 31, Article 3 benchmark electricityPole 33, Article 4 reference electrode 34 and Article 5 reference electrode 35 input detection signal AC, this moment, the second row detecting electrodeWhether 22 its region of detection occur pressure touch behavior；At the T3 moment, 33 input reference voltage DC of Article 3 reference electrode,First reference electrode 31, Article 2 reference electrode 32, Article 4 reference electrode 34 and Article 5 reference electrode 35 input inspectionSignal AC, this moment are surveyed, the third line detecting electrode 23 detects whether its region occurs pressure touch behavior；At the T4 moment,34 input reference voltage DC of Article 4 reference electrode, first reference electrode 31, Article 2 reference electrode 32, Article 3 benchmark electricityPole 33 and Article 5 reference electrode 35 input detection signal AC, and at this moment, fourth line detecting electrode 24 detects its regionWhether pressure touch behavior is occurred；At the T5 moment, 35 input reference voltage DC of Article 5 reference electrode, first reference electrode31, Article 2 reference electrode 32, Article 3 reference electrode 33 and Article 4 reference electrode 34 input detection signal AC, at this timeIt carves, fifth line detecting electrode 25 detects whether its region occurs pressure touch behavior.It should be noted that the T2 moment,T3 moment, T4 moment and T5 moment, the principle for eliminating part lead capacitance please refer to the explanation at T1 moment.The embodiment of the present invention carriesIt is same in detection lead and the reference electrode the input phase overlapped in a direction perpendicular to a substrate with it in a kind of touch device suppliedDetection signal reduce the influence for the basic capacitance for detection pressure variable quantity to eliminate part lead capacitance, fromAnd improve the working performance of touch panel.

In some optional realization methods, in order to further eliminate lead capacitance, reference electrode with perpendicular to substrateThe detection lead being electrically connected with its overlapping detecting electrode on direction does not overlap.Referring to FIG. 3, in order to clearly illustrate this implementationThe technical solution of example, with one piece of detecting electrode 222 in the second row detecting electrode 22, the detection that is electrically connected with detecting electrode 222It is illustrated for lead 42.Detecting electrode 222 is being overlapped with Article 2 reference electrode 32 on the direction of substrate 10, and twoPerson forms coupled capacitor and upwards pressure perpendicular to 10 side of substrate for detecting；In the pressure detecting stage, detecting electrode 222 carries outWhen pressure touch detects, detection signal is inputted to detecting electrode 222, and to 32 input reference voltage of Article 2 reference electrode,It is equal to first reference electrode 31, Article 3 reference electrode 33, Article 4 reference electrode 34 and Article 5 reference electrode 35 simultaneouslyInput detection signal.The moment, detection lead 42 be not overlapping because without forming lead capacitance, detection with Article 2 reference electrode 32Electrode 222 is formed with Article 2 reference electrode 32 for detecting the coupled capacitor to upward pressure perpendicular to 10 side of substrate, the couplingIt includes the lead capacitance for detecting lead 42 and being formed with Article 2 reference electrode 32 to close capacitance not, further reduced lead capacitance pairIn the influence of the basic capacitance for detection pressure variable quantity, to further increase the working performance of touch panel.

It should be noted that a kind of touch device provided in an embodiment of the present invention, in the pressure detecting stage, at leastTwo reference electrodes, thereto the input sequence of a reference electrode input reference voltage do not limit, the inspection of pressure that Fig. 4 is providedA kind of signal waveform schematic diagram in survey stage is merely illustrative, and should not cause the limitation for the present invention.For example, Fig. 5 isA kind of another signal waveform schematic diagram in touch device pressure detecting stage that Fig. 3 embodiments provide.It please refers to Fig.4 and Fig. 5,At the T1 moment, 35 input reference voltage DC of Article 5 reference electrode, first article of reference electrode 31, Article 2 reference electrode 32,Three reference electrodes 33 and Article 4 reference electrode 34 input detection signal AC, and at this moment, fifth line detecting electrode 25 detectsWhether its region occurs pressure touch behavior；At the T2 moment, Article 2 reference electrode 32 input reference voltage DC, firstReference electrode 31, Article 3 reference electrode 33, Article 4 reference electrode 34 and Article 5 reference electrode 35 input detection signalAC, this moment, the second row detecting electrode 22 detect whether its region occurs pressure touch behavior；At the T3 moment, Article 4Reference electrode 34 input reference voltage DC, first reference electrode 31, Article 2 reference electrode 32,33 and of Article 3 reference electrodeArticle 5 reference electrode 35 inputs detection signal AC, and at this moment, fourth line detecting electrode 24 detects whether its region is sent outRaw pressure touch behavior；At the T4 moment, 33 input reference voltage DC of Article 3 reference electrode, first reference electrode 31, secondReference electrode 32, Article 4 reference electrode 34 and Article 5 reference electrode 35 input detection signal AC, this moment, the third lineDetecting electrode 23 detects whether its region occurs pressure touch behavior；At the T5 moment, first reference electrode 31 inputs baseQuasi- voltage DC, Article 2 reference electrode 32, Article 3 reference electrode 33, Article 4 reference electrode 34 and Article 5 reference electrode 35Input detection signal AC, this moment, the first row detecting electrode 21 detect whether its region occurs pressure touch behavior.It needsIt is noted that Fig. 5's and Fig. 4 the difference is that only to first reference electrode 31, Article 2 reference electrode 32, Article 3Reference electrode 33, Article 4 reference electrode 34 are different with the input sequence of 35 input reference voltage of Article 5 reference electrode, and firstRow detecting electrode 21, the second row detecting electrode 22, the third line detecting electrode 23, fourth line detecting electrode 24 and fifth line detection electricityThe pressure detecting principle and advantageous effect of pole 25 please refer to Fig.4 the embodiment of offer.

It is to fix with reference voltage DC it should be noted that in the touch device that Fig. 4 embodiments and Fig. 5 embodiments provideVoltage signal detects signal AC to be illustrated for square-wave signal.In other realization methods of the present invention, reference voltage canThink the first square-wave signal, detection signal is the second square-wave signal, and the first square-wave signal and the second square wave signal frequency phaseWith, phase is identical, amplitude is different, equally may be implemented the present invention technique effect.In some optional realization methods, benchmarkVoltage is earth signal, and detection signal is square-wave signal, using earth signal as reference voltage, without being additionally provided voltage signal.

In some optional realization methods, touch device further includes public electrode, and reference electrode is multiplexed with public electrode.Touch device provided in this embodiment further includes the display stage, and in the display stage, common voltage is inputted to reference electrode.It please refers toFig. 3 and Fig. 6, Fig. 6 illustrate the pressure of touch device provided in this embodiment by taking a kind of touch device that Fig. 3 embodiments provide as an exampleThe signal waveform schematic diagram of detection-phase and display stage.A kind of touch device provided in this embodiment includes pressure detecting rankSection, the signal waveform schematic diagram in pressure detecting stage in the present embodiment referring to FIG. 4, repeat no more.Provided in this embodiment oneKind of touch device further includes display stage Tx, in showing stage Tx, first reference electrode 31, Article 2 reference electrode 32,Article 3 reference electrode 33, Article 4 reference electrode 34 and Article 5 reference electrode 35 input common voltage Vcom.It is showingIn stage Tx, the voltage signal Vt that detecting electrode 20 inputs can be common voltage Vcom, in the voltage value of common voltage VcomClose in the case of ground signalling, the voltage signal Vt that detecting electrode 20 inputs can be ground signalling, at this time first benchmark electricityPole 31, Article 2 reference electrode 32, Article 3 reference electrode 33, Article 4 reference electrode 34, Article 5 reference electrode 35 and inspectionThe voltage difference surveyed between electrode 20 is smaller, and the influence for touch device can be ignored.It should be noted that the present embodiment pairThe voltage value of common voltage Vcom and the magnitude relationship of the voltage value of reference voltage DC are not restricted.In the prior art, publicVoltage is fixed voltage signal or square-wave signal, and Fig. 6 is illustrated so that common voltage is fixed voltage signal as an example, but this hairIt is bright that this is not restricted.Touch device provided in this embodiment has pressure detecting function and display function, pressure detecting stageIt carries out with display stage timesharing, while not increasing public electrode additionally, pressure detecting function and display function is integrated to togetherIn one touch device.

In some optional realization methods, referring to FIG. 7, Fig. 7 is the sectional view along AA ' in Fig. 2.Substrate 10 includesReference electrode 30 and pel array 50, touch device provided in an embodiment of the present invention further include color membrane substrates 12, color membrane substrates 12Including detecting electrode 20.

In some optional realization methods, touch device provided in an embodiment of the present invention further includes being held and mounted on substrateDisplay function layer 13 between 10 and color membrane substrates 12, detecting electrode 20 are arranged on color membrane substrates 12 close to display function layer 13Side.Display function layer 13 provided in this embodiment can be liquid crystal layer.In touch device provided in this embodiment, detection electricityPole 20 is closer at a distance from reference electrode 30, when pressure touch occurs, the ratio of distance change amount caused by pressure touch compared withGreatly, to improve pressure sensitivity signal strength, signal-to-noise ratio is improved.

In some optional realization methods, with continued reference to FIG. 7, color membrane substrates 12 further include touch control electrode 50, touch-controlElectrode 50 is for detecting position of touch.It should be noted that the touch-control with detection position of touch function that the prior art providesIn the touch device of electrode, according to the operation principle of touch control electrode, can be divided into single layer touch control electrode self-capacitance touch device,Single layer touch control electrode mutual capacitance type touch control device, multilayer touch control electrode self-capacitance touch device, multilayer touch control electrode mutual capacitanceFormula touch device, the present invention are not restricted the shape and operation principle of touch control electrode 50.Touch device provided in this embodiment,It is integrated with the function of detection position of touch, keeps the function of touch device provided in this embodiment more rich.

In some optional realization methods, touch device provided in an embodiment of the present invention further includes driving unit.It please joinFig. 2 is examined, a reference electrode 30 is electrically connected by two benchmark leads 60 with driving unit, and driving unit is core in the present embodimentPiece 70 (IC, Integrated Circuit), chip 70 transmit voltage by benchmark lead 60 at least two reference electrodes 30Signal.In some optional realization methods, referring to FIG. 8, Fig. 8 continues to use the reference numeral of Fig. 2, something in common repeats no more,Fig. 8 the difference from Fig. 2 is that, driving unit is driving circuit 80, and driving circuit 80 is arranged in the both sides of substrate 10, oneReference electrode 30 is connect with the driving circuit of both sides 80 respectively by two benchmark leads 60, and driving circuit 80 passes through signal wire 81It is connect with chip 70, chip 70 transmits voltage signal by signal wire 81 to driving circuit 80, and driving circuit 80 will come from chip70 voltage signal is transmitted separately at least two reference electrodes 30.Illustratively, driving circuit 80 is DEMUX circuits(Demultiplexer).Illustratively, driving circuit 80 can pass through etching technics using the existing film layer structure of touch deviceIt is formed on the substrate 10.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said thatThe specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, existUnder the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention'sProtection domain.

Claims (9)

1. a kind of touch device, which is characterized in that including：

Substrate；

Detecting electrode is arranged in m row n array column, and m, n are integer and m >=1, n >=1；

Lead is detected, is extended along column direction, one piece of detecting electrode is electrically connected at least one detection lead, describedDetection lead is arranged with the detecting electrode using same material same layer；

At least two reference electrodes extend along line direction and are arranged along the column direction, reference electrode withDetecting electrode described in a line is overlapping on the direction of the substrate, and the reference electrode forms coupling with the detecting electrodeCapacitance is closed for detecting the pressure on the orientation substrate；

The touch device includes the pressure detecting stage；

In the pressure detecting stage, while to all detecting electrodes input detection signals, and thereto one successivelyThe reference electrode input reference voltage, while inputting the detection signal to reference electrode described in remaining.

2. touch device as described in claim 1, which is characterized in that the touch device further includes public electrode, the baseCollimator electrode is multiplexed with the public electrode, and the touch device further includes the display stage, in the display stage, to the benchmarkElectrode inputs common voltage.

3. touch device as described in claim 1, which is characterized in that the reference voltage is fixed voltage signal, the inspectionSurvey signal is square-wave signal.

4. touch device as claimed in claim 3, which is characterized in that the reference voltage is earth signal.

5. touch device as described in claim 1, which is characterized in that the reference electrode with perpendicular to the orientation substrateThe upper detection lead being electrically connected with its overlapping described detecting electrode does not overlap.

6. touch device as described in claim 1, which is characterized in that

The substrate includes the reference electrode and pel array；

The touch device further includes color membrane substrates, and the color membrane substrates include the detecting electrode.

7. touch device as claimed in claim 6, which is characterized in that the touch device further includes being held and mounted on the baseDisplay function layer between plate and the color membrane substrates, the detecting electrode are arranged on the color membrane substrates close to the displayThe side of functional layer.

8. touch device as claimed in claim 7, which is characterized in that the color membrane substrates further include touch control electrode, described to touchControl electrode is for detecting position of touch.

9. touch device as described in claim 1, which is characterized in that a reference electrode by two benchmark leads withDriving unit is electrically connected, and the driving unit is chip or driving circuit.